org.apache.poi.xssf.streaming.SXSSFPicture Maven / Gradle / Ivy
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this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
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http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.poi.xssf.streaming;
import java.awt.Dimension;
import java.io.IOException;
import java.io.InputStream;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.poi.openxml4j.opc.PackagePart;
import org.apache.poi.ss.usermodel.Picture;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Shape;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.util.ImageUtils;
import org.apache.poi.util.Internal;
import org.apache.poi.util.Units;
import org.apache.poi.xssf.usermodel.XSSFAnchor;
import org.apache.poi.xssf.usermodel.XSSFClientAnchor;
import org.apache.poi.xssf.usermodel.XSSFDrawing;
import org.apache.poi.xssf.usermodel.XSSFPicture;
import org.apache.poi.xssf.usermodel.XSSFPictureData;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.openxmlformats.schemas.drawingml.x2006.main.CTPositiveSize2D;
import org.openxmlformats.schemas.drawingml.x2006.main.CTShapeProperties;
import org.openxmlformats.schemas.drawingml.x2006.spreadsheetDrawing.CTPicture;
import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTCol;
/**
* Streaming version of Picture.
* Most of the code is a copy of the non-streaming XSSFPicture code.
* This is necessary as a private method getRowHeightInPixels of that class needs to be changed, which is called by a method call chain nested several levels.
*
* The main change is to access the rows in the SXSSF sheet, not the always empty rows in the XSSF sheet when checking the row heights.
*/
public final class SXSSFPicture implements Picture {
private static final Logger LOG = LogManager.getLogger(SXSSFPicture.class);
/**
* Column width measured as the number of characters of the maximum digit width of the
* numbers 0, 1, 2, ..., 9 as rendered in the normal style's font. There are 4 pixels of margin
* padding (two on each side), plus 1 pixel padding for the gridlines.
*
* This value is the same for default font in Office 2007 (Calibri) and Office 2003 and earlier (Arial)
*/
private static final float DEFAULT_COLUMN_WIDTH = 9.140625f;
private final SXSSFWorkbook _wb;
private final XSSFPicture _picture;
SXSSFPicture(SXSSFWorkbook _wb, XSSFPicture _picture) {
this._wb = _wb;
this._picture = _picture;
}
/**
* Return the underlying CTPicture bean that holds all properties for this picture
*
* @return the underlying CTPicture bean
*/
@Internal
public CTPicture getCTPicture(){
return _picture.getCTPicture();
}
/**
* Reset the image to the original size.
*
*
* Please note, that this method works correctly only for workbooks
* with the default font size (Calibri 11pt for .xlsx).
* If the default font is changed the resized image can be stretched vertically or horizontally.
*
*/
@Override
public void resize(){
resize(1.0);
}
/**
* Reset the image to the original size.
*
* Please note, that this method works correctly only for workbooks
* with the default font size (Calibri 11pt for .xlsx).
* If the default font is changed the resized image can be stretched vertically or horizontally.
*
*
* @param scale the amount by which image dimensions are multiplied relative to the original size.
* resize(1.0) sets the original size, resize(0.5) resize to 50% of the original,
* resize(2.0) resizes to 200% of the original.
*/
@Override
public void resize(double scale){
XSSFClientAnchor anchor = getClientAnchor();
XSSFClientAnchor pref = getPreferredSize(scale);
if (anchor == null || pref == null) {
LOG.atWarn().log("picture is not anchored via client anchor - ignoring resize call");
return;
}
int row2 = anchor.getRow1() + (pref.getRow2() - pref.getRow1());
int col2 = anchor.getCol1() + (pref.getCol2() - pref.getCol1());
anchor.setCol2(col2);
anchor.setDx1(0);
anchor.setDx2(pref.getDx2());
anchor.setRow2(row2);
anchor.setDy1(0);
anchor.setDy2(pref.getDy2());
}
/**
* Calculate the preferred size for this picture.
*
* @return XSSFClientAnchor with the preferred size for this image
*/
@Override
public XSSFClientAnchor getPreferredSize(){
return getPreferredSize(1.0);
}
/**
* Calculate the preferred size for this picture.
*
* @param scale the amount by which image dimensions are multiplied relative to the original size.
* @return XSSFClientAnchor with the preferred size for this image
*/
public XSSFClientAnchor getPreferredSize(double scale){
XSSFClientAnchor anchor = getClientAnchor();
if (anchor == null) {
LOG.atWarn().log("picture is not anchored via client anchor - ignoring resize call");
return null;
}
XSSFPictureData data = getPictureData();
Dimension size = getImageDimension(data.getPackagePart(), data.getPictureType());
double scaledWidth = size.getWidth() * scale;
double scaledHeight = size.getHeight() * scale;
float w = 0;
int col2 = anchor.getCol1()-1;
while (w <= scaledWidth) {
w += getColumnWidthInPixels(++col2);
}
assert (w > scaledWidth);
double cw = getColumnWidthInPixels(col2);
double deltaW = w - scaledWidth;
int dx2 = (int)(Units.EMU_PER_PIXEL * (cw - deltaW));
anchor.setCol2(col2);
anchor.setDx2(dx2);
double h = 0;
int row2 = anchor.getRow1()-1;
while (h <= scaledHeight) {
h += getRowHeightInPixels(++row2);
}
assert (h > scaledHeight);
double ch = getRowHeightInPixels(row2);
double deltaH = h - scaledHeight;
int dy2 = (int)(Units.EMU_PER_PIXEL * (ch - deltaH));
anchor.setRow2(row2);
anchor.setDy2(dy2);
CTPositiveSize2D size2d = getCTPicture().getSpPr().getXfrm().getExt();
size2d.setCx((long)(scaledWidth * Units.EMU_PER_PIXEL));
size2d.setCy((long)(scaledHeight * Units.EMU_PER_PIXEL));
return anchor;
}
private float getColumnWidthInPixels(int columnIndex){
XSSFSheet sheet = getSheet();
CTCol col = sheet.getColumnHelper().getColumn(columnIndex, false);
double numChars = col == null || !col.isSetWidth() ? DEFAULT_COLUMN_WIDTH : col.getWidth();
return (float)numChars*Units.DEFAULT_CHARACTER_WIDTH;
}
private float getRowHeightInPixels(int rowIndex) {
// THE FOLLOWING THREE LINES ARE THE MAIN CHANGE compared to the non-streaming version: use the SXSSF sheet,
// not the XSSF sheet (which never contais rows when using SXSSF)
XSSFSheet xssfSheet = getSheet();
SXSSFSheet sxSheet = _wb.getSXSSFSheet(xssfSheet);
Sheet sheet = sxSheet == null ? xssfSheet : sxSheet;
Row row = sheet.getRow(rowIndex);
float height = row != null ? row.getHeightInPoints() : sheet.getDefaultRowHeightInPoints();
return height * Units.PIXEL_DPI / Units.POINT_DPI;
}
/**
* Return the dimension of this image
*
* @param part the package part holding raw picture data
* @param type type of the picture: {@link Workbook#PICTURE_TYPE_JPEG},
* {@link Workbook#PICTURE_TYPE_PNG} or {@link Workbook#PICTURE_TYPE_DIB}
*
* @return image dimension in pixels
*/
protected static Dimension getImageDimension(PackagePart part, int type){
try (InputStream stream = part.getInputStream()) {
return ImageUtils.getImageDimension(stream, type);
} catch (IOException e){
//return a "singulariry" if ImageIO failed to read the image
LOG.atWarn().withThrowable(e).log("Failed to read image");
return new Dimension();
}
}
/**
* Return picture data for this shape
*
* @return picture data for this shape
*/
@Override
public XSSFPictureData getPictureData() {
return _picture.getPictureData();
}
protected CTShapeProperties getShapeProperties(){
return getCTPicture().getSpPr();
}
@Override
public XSSFAnchor getAnchor() {
return _picture.getAnchor();
}
@Override
public void resize(double scaleX, double scaleY) {
_picture.resize(scaleX, scaleY);
}
@Override
public XSSFClientAnchor getPreferredSize(double scaleX, double scaleY) {
return _picture.getPreferredSize(scaleX, scaleY);
}
@Override
public Dimension getImageDimension() {
return _picture.getImageDimension();
}
@Override
public XSSFClientAnchor getClientAnchor() {
XSSFAnchor a = getAnchor();
return (a instanceof XSSFClientAnchor) ? (XSSFClientAnchor)a : null;
}
public XSSFDrawing getDrawing() {
return _picture.getDrawing();
}
@Override
public XSSFSheet getSheet() {
return _picture.getSheet();
}
@Override
public String getShapeName() {
return _picture.getShapeName();
}
@Override
public Shape getParent() {
return _picture.getParent();
}
@Override
public boolean isNoFill() {
return _picture.isNoFill();
}
@Override
public void setNoFill(boolean noFill) {
_picture.setNoFill(noFill);
}
@Override
public void setFillColor(int red, int green, int blue) {
_picture.setFillColor(red, green, blue);
}
@Override
public void setLineStyleColor( int red, int green, int blue ) {
_picture.setLineStyleColor(red, green, blue);
}
}